You are . . . . . . . . your time trying to persuade him, he will never help you. A. missing B. losing C. spending D. wasting

The correct answer is wasting.

The other options are:

• Missing – this means not being present or not noticing something. In this case, the speaker is not missing anything by not trying to persuade the person.
• Losing – this means not having something anymore. In this case, the speaker is not losing anything by not trying to persuade the person.
• Spending – this means using money or time on something. In this case, the speaker is spending their time trying to persuade the person, but it is not a good use of their time.

The speaker is wasting their time trying to persuade the person because the person will never help them. The speaker should stop trying to persuade the person and focus on something else.